Home | History | Annotate | Download | only in pdf 
      1 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef PDF_FADING_CONTROLS_H_
      6 #define PDF_FADING_CONTROLS_H_
      7 
      8 #include <list>
      9 
     10 #include "pdf/control.h"
     11 
     12 namespace chrome_pdf {
     13 
     14 class FadingControls : public Control,
     15                        public ControlOwner {
     16  public:
     17   enum FadingState {
     18     NONE,
     19     FADING_IN,
     20     FADING_OUT
     21   };
     22 
     23   FadingControls();
     24   virtual ~FadingControls();
     25   virtual bool CreateFadingControls(
     26       uint32 id, const pp::Rect& rc, bool visible,
     27       Control::Owner* delegate, uint8 transparency);
     28 
     29   // Control interface.
     30   virtual void Paint(pp::ImageData* image_data, const pp::Rect& rc);
     31   virtual bool HandleEvent(const pp::InputEvent& event);
     32   virtual void OnTimerFired(uint32 timer_id);
     33   virtual void EventCaptureReleased();
     34   virtual void MoveBy(const pp::Point& offset, bool invalidate);
     35 
     36   // ControlOwner interface.
     37   virtual void OnEvent(uint32 control_id, uint32 event_id, void* data);
     38   virtual void Invalidate(uint32 control_id, const pp::Rect& rc);
     39   virtual uint32 ScheduleTimer(uint32 control_id, uint32 timeout_ms);
     40   virtual void SetEventCapture(uint32 control_id, bool set_capture);
     41   virtual void SetCursor(uint32 control_id, PP_CursorType_Dev cursor_type);
     42   virtual pp::Instance* GetInstance();
     43 
     44   // FadingControls interface
     45   // This function takes ownership of the control, and will destoy it
     46   // when control is destroyed.
     47   // Input control MUST be located inside FadingControls boundaries, and has
     48   // this instance of FadingControls as a delegate.
     49   virtual bool AddControl(Control* control);
     50   virtual void RemoveControl(uint32 control_id);
     51   virtual Control* GetControl(uint32 id);
     52   virtual pp::Rect GetControlsRect();
     53 
     54   // Expand/Shrink area which triggers inner control appearance to the left.
     55   virtual bool ExpandLeft(int offset);
     56 
     57   // Fade-in, then show controls for time_ms, and then fade-out. Any mouse
     58   // event in this control area will interrupt splash mode.
     59   virtual void Splash(uint32 time_ms);
     60 
     61   uint8 current_transparency() const { return current_transparency_; }
     62 
     63  private:
     64   bool NotifyControls(const pp::InputEvent& event);
     65   void FadeIn();
     66   void FadeOut();
     67   void OnFadingComplete();
     68   void CancelSplashMode();
     69 
     70   std::list<Control*> controls_;
     71   FadingState state_;
     72   uint8 current_transparency_;
     73   uint32 fading_timer_id_;
     74   uint32 current_capture_control_;
     75   uint32 fading_timeout_;
     76   uint32 alpha_shift_;
     77   bool splash_;
     78   uint32 splash_timeout_;
     79 };
     80 
     81 }  // namespace chrome_pdf
     82 
     83 #endif  // PDF_FADING_CONTROLS_H_
     84 
     85